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Deep holes are defined by a ratio between the hole depth and the hole diameter.
Deep hole ratio depths are more than 10x the diameter and up to 150x the diameter ratio.
There are 3 types of deep drilling methods:
Gundrills
STS (Single tube system)
DTS (Double tube system)

   



High Table Feeds


ISCAR Single Flute Gundrill


Deep Hole Drilling Index


Deep Drills for Milling Centers and Lathe Machines


TRIDEEP Gundrills and
Deep Drilling Heads